Roller-grinding machine.



W. E. BOCK.

ROLLER GRINDING MACHINE.

APPLlCATION FILED APR. 14. um.

1,286,871 Patented Dec. 3, 1918.

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WIIIII I4 if W. E. BOCK. ROLLER GRINDING MACHINE.

APPLICATION FILED APR. 14. 1917.

Patented Dec. 3, 1918.

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W. E. BOCK.

ROLLER GRINDING MACHINE.

APPLICATION FILED ANA-4.1917- l,286,8 71 Patented Dec. 3, 1918.

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IAN/ENTER W. E. BOCK.

ROLLER GRINDING MACHINE.

APPLICATION FILED APR. 14. 1917.

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ROLLER GRINDING MACHINE.

APPLlCATlON FILED APR. 14. 1917.

1,286,871 Patented Dec. 3,1918.

10 SHEETS-SHEET S,

W. E. BOCK.

ROLLER GRINDING MACHINE.

APPLICATION men APR.14. an. n 1,286,871. Patented Dec. 0, 191b l0 SHEETS-SHEET 6.

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R-OLLER GRINDING MACHINE. APPLICATION FILED APR. 14. 1911.

- 1,286,871 Patented I'M- 1, :5, 1221a.

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ROLLER GRINDING MACHINE.

APPLICATION FILED APR.14. 1917.

Patented Dec. 3, W18.

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W. E. BOCK.

ROLLER GRINDING MACHINE.

. APPLICATION FILED APR. 14. 1917- Patel lted Dec- 3' w. E. BOCK. ROLLER GRINDING MACHINE.

APPLICATION FILED APR. I4. I917.

Patented Dec. 3, 1918.

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?"IIIIIIIIIIIIIIIIIIIIIII STATES PATEN WILLIAM EMIL BOOK, OF TOLEDO, OHIO, ASSIGNOR TO THE BOOK BEARING COMPANY,

A CORPORATION OF OHIO.

ROLLER- GRINDING MACHINE.

Specification of Letters Patent.

Patented Dec. 3, 1918.

Continuation of application Serial No. 99,286, filed May 23, 1916. This application filed April 14, 1917.

Serial No. 162,224.

To all whom, it may concern:

Be it known that I, WILLIAM EMIL BooK, a citizen of the United States. and a resident of Toledo, in the county of Lucas and State of Ohio, have invented a certain new and useful Roller-Grinding Machine; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to grinding machines and particularly to machines for grinding the convexed ends of the rollers of roller bearings.

The object of my invention is the provision of a simple and efiicient machine of the-character described which is automatically operable to intermittently feed the articles to be ground to a rotary holding means. move said means to place the held article in grinding position, then turn said means on an axis concentric to the arc of the part of the article to be ground and with respect to the grinding medium to effect a grinding of the convexed end of the article, then returning the holding means to article recei ing position, and when at a predetermined point in said returning movement efiecting an ejection of the ground article from said means.

A further object of my invention is the provision of simple and eflicient means for intermittently feeding and delivering articles in predetermined timed order to the means which holds the Work during the grinding operation.

A further object of my invention is the provision of work holding means having a rotary work holding arbor or part and being mounted for, and automatically operated to have, compound movements while being rotated, whereby to move work carried thereby to and from grinding position and in an arc with'respect to the grinding medium.

A further object of my invention is the provision of simple and eflicient means for ejecting work pieces from the arbor after each grindingv operation and at apredetermined point in each cycle of movements of the arbor.

Other objects and advantages of the invention will be apparent from the following detailed description thereof.

The invention is fully described in the following specification, and while. in its broader aspect, it is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, in which,

Figure 1 is a front elevation of a machine embodying the invention. Fig. 2 is a top plan view thereof. Fig. 3 is an enlarged vertical cross-section on the lines 3, 3 in Figs. 1 and 2. Fig. 4 is an enlarged plan view of one end portion of the machine with parts removed and broken away, and with.

the operative parts in the position which they assume immediately after the rollers have been delivered to the respective holding arbors. Fig. 5 is an enlarged detail of a portion of the cam control means of the machine, with parts broken away. Fig. 6 is an enlarged vertical sectional detail of the arbor carrying and driving means with rollers held in grinding position thereby. Fig. 7 is an enlarged central longitudinal section of a roller holding arbor with a roller in position thereon. Fig. 8 is a sectional detail of a portion of the means for introducing air under pressure into the arbor. Fig. 9 is a section on the line 9, 9 in Fig. 1. Fig. 10 is an enlarged section on the line 10, 10 in Fig. 4. Fig. 11 is a section on ,the line 11, 11 in Fig. 10. Fig. 12 is an enlarged detail of the grinding Wheel turning means and carrying parts therefor with parts in section. Fig. 13 is an enlarged plan of the rotary cam members and associated driving means. Fig. 14

is an elevation of the article-receiver and the eration.

This application is filed as a continuation of my prior application Serial Number 99.286, filed May 23, 1916.

Referring to the drawings, 1 designates the frame of the machine, and secured to one end thereof is a bracket or frame part 2 in the outer end of which is journaled a vertically disposed shaft 3 having a wormwheel 4 keyed to the upper end thereof. A horizontal shaft 5 is journaled in the bracket or frame part 2 at one side of the wormwheel 4 and carries a worm 6 in driving mesh with said worm-wheel. A pulley 7 is loosely carried by the shaft 5, and a belt 8 extends from this pulley to any suitable source of power, or the pulley may be driven in any other suitable manner as desired. 9 designates a pair of guide rollers, which serve to guide the course of movement of the belt 8. A shiftable clutch member 10 is feathered on the, shaft 5 at one side of the pulley 7 and is movable axially of the shaft into and out of cone clutch engagement with the adjacent side portion of the pulley. A shipper lever 11 is fulcrumed to the bracket 2, as at 12, and has one end in shifting engagement with the clutch member 10 and its other end connected to a control rod 13 which is guided for movements lengthwise of the frame 1 by a bracket part 14, in which it is mounted. The clutch member 10 is normally held in clutch engagement with the pulley 7 by the act-ion of a coiled expansion spring 15'on the control rod 13, said spring having one end thrust against a side portion of the bracket 14 and its other end thrust against a pin or stop-part on the control rod. A spring finger 16 bears against one side of the outer end portion of the control rod 13 and tends to force a notch 17 on one side thereof into engagement with a registering part of the bracket 14 through which the rod passes when the rod is at the limit of its inward movement.

Fixed to the shaft 3 above the worm-wheel 4 is a cam-wheel '18 having an endless cam groove 19 in its top surface and an endless cam groove 20 in its bottom surface. The frame 1 has a slide 21 mounted for lengthwise reciprocatory movements thereon .and is provided at one end with a roller 22' which projects into the groove 20 of the cam-wheel 18, whereby a rotation of said wheel causes said slide to have predetermined reciprocatory movements with respect to the frame. The upper end of the bracket 14 extends rearward over the top of the slide 12 adjacent to the cam-wheel 18 and forms a guide, as shown at 14 in Fig. 3, for a slide-plate 23, which is mounted for reciprocatory movements lengthwise of the frame 1'. The outer end of the slide-plate 23 overhangs the camwheel 18 and carries a roller 24 in position .in a respective bearin to travel in the cam-groove 19. The groove 19 is of heart shape, in the present instance, and is $0 arranged with respect. to the axis of the camwheel as to impart quite a decided stroke or throw to the slide-plate The cam-groove 20 is arranged to impart movement in one direction to the slide 21 when the slide-plate 23 is being moved in the opposite direction, but does not impart as great a throw or stroke to the slide 21 as is imparted to the slide 23, as will be hereinafter more fully described.

The slide 21 is provided on its top with a table 25 and rising from the rear portion of this table adjacent to its outer end is a standard 26. (See Figs. 2, 4 and 12'). An arm 27 projects transversely from the upper end of the standard 26 toward the left or inner end of the slide 21 and is provided atits free end with a cone bearing 28 in which the upper end of a yoke 29 is mounted for horizontal turning movements, as best shown in Fig. 6, the lower end of said yoke being correspondingly mounted in a conical bearing 30 provided in the table 25 in axial register with the bearing 28. The yoke 29 has its trunnion or hearing parts 31, 31

transversely offset-from its body portion to permit the body portion to have revoluble I movements with respect to the axis of sald parts.

The yoke 29 carries two arbors 32 in vertically spaced relation, each being mounted sleeve 33 for rotary movements therein. ach arbor 32'is provided at its outer end with a conically enlarged portion for end thrust bearing contact with the respective end of the sleeve 33,

and is provided at its other end with a collar 34, which has a conical surface for end thrust contact with the rear end of the sleeve 33, as best shown in Figs. 6 and 7. A pinion 35 is keyed to the inner end of each arbor 32 and meshes with. a drive pinion 36 that is mounted on a shaft 37 and disposed intermediate the two pinions 35. A coiled expansion spring 38 is mounted around the rear end portion of each arbor 32 and has one end thrust against the bearing collar 34 to force it against the adjacent end of the sleeve 33 and its other end thrust against a collar or shouldered part 39 on the arbor, whereby the forward conical end portion of the arbor is held in bearing thrust contact with the outer end of the sleeve 33, as is apparent. Each arbor 32 is provided at its forward or outer end with a nipple 40 which forms a chuck for receiving and holding the conical or body portion of a roller (1, the mouth portion of the nipple bore being of conical form for such purpose.

Each arbor 32 has an axial passage therethrough which registers at its forward end with the nipple passage 41 and has a work ejecting ram 42 mounted for reciprocatory hereinafter described. The forward end of the passage 44 i closed except for one or more lateral discharge orifice 45, which,

when the ram is in the retracted positionshown in Figs. 6 and 7, are closed by the wall of the arbor passage and are uncovered to the interior of the nipple when the ram' has been moved forward a predetermined extent from its retracted position, the bore of the nipple 40 being larger than the bore of the arbor passage for such purpose. The arbors 32, 32 are inclined with respect to each other in a vertical plane to place their axes in alincment with respective radii of a grinding wheel 46 with the periphery of which the outer convexed ends of rollers a carried by the arbors are intended to have grinding contact.

A housing member 47 projects from the outer side of the yoke 29 in inclosing relation to the geared end of the arbors 32 and has 'a bearing part 48 projecting outwardly therefrom and forming the bearing for, the

shaft 37. The shaft 37 projects without the outer end of the bearing part 48 and carries a belt pulley 49 which is connected by a belt 50 to an overhead pulley 51 carried by a shaft 52. The shaft 52 is journaled in the cross-arm of a T-bracket 53 that rises from the outer side portion of the yoke 29,

whereby it is caused to have turning move ments in unison with said yoke. A pulley 54 on the shaft 52 i connected by a belt 55 to any suitable source of power. It will be noted that the pulley 54 is disposed in line with the turning axis of the yoke 29 to prevent a decided tightening or loosening of the belt 55 when the yoke and parts carried thereby are turned.

A rod 56 connects the slide-plate 23 and yoke 29 to communicate swinging movements to the latter from sliding movements of the former, and is pivoted, in the pres:

ent instance, at one end to the slide plate 23, as at 56*, and at its other end to the under side of the housing 47, as at 56". (See Figs. 4 and 6.) When the slide plate 23 is at the limit of its outward stroke the arbor 29 stands in the position shown in Fi 4 with respect to the grinding wheel 46, with the arbors 22 in article receiving position. When rollers or other articles have been delivered to the holding-ends of the arbors 32, the arbor 29 is swung on its axis by reason of the rearward stroke imparted to the slide-plate 23 by the cam-groove 19, and the axis of the yoke is simultaneously shifted lengthwise of the machine and transversely of the grinding-wheel 46 by reason of the movement imparted to the slide 21 and table by the cam-groove 20. It is thus apparent that the convexed end of'a rolleror other article carried by-each arbor 32 is moved backward and forward across the periphery of the grinding-wheel 46 and at the same time is swung about the arbor axis an extent corresponding to a cross-sectional arc of the convexed surface to be ground so that ,all points of such surface, which it. will be understood is rapidly rotating, will be brought into grinding contact with the grinding stone.

One or more brackets 57 rise from the rear side of the frame 1 near the left-hand end thereof, or in opposition to the bracket '14, and cooperate with the upper reartable 25 and rearwardly thercthrough, as

best shown in Figs. 2 and 4.

Mounted on and rigidly rising from the wing 78 of the bracket-plate 58 is a standard 60, which has two magazine tubes 61 rigidly projecting through the upper endportion thereof, said tubes being inclined to permit the gravity feed of rollers a or other articles therethrough. The lower ends of the magazine tubes 61 terminate adjacent to a rotary article receiver 62 that is provided with an article-receiving chamber 63' for each tube. The manner of mounting" and controlling the movements of the receive-r62 will be hereinafter described.

Two bars or slides 64 and 65 are carriet for transverse reciprocatory movements by the upper end portion of the bearing standard 60, and these rods have arms 66 and 67 projecting transversely therefrom, respectively. (See Figs. 17 and 18.) The-arm 66 has afinger 68 projecting therefrom for each magazine tube 61 and into the respcc tive tube through a registering opening in the side of the block or standard 60. Vhen the rod 64 is at the limit of its inward movement the fingers 68 project within the respective magazine tubes 61 and engage the lowermost roller (1 therein to support the roller column within the magazine, as is apparent. The other arm 67 carries afinger 69 for each magazine tube 61, and such fingers project through any one of a respective set of openings 70 in the block and enter the respective tubes so that when the rod 65 is at the limit of its inward movement the ends of the fingers 69 bear transversely against the next to the lowermost roller a in the respective magazine tube and prevent the lowering of such roller and the rollers supported thereby until the holding fingers 69 have been moved outward for that purpose. The fingers 69 are intended to be moved to clamp the respective rollers a before the fingers 68 have been moved outward to release the lowermost roller in each tube,

thereby supporting the column of rollers to the receiver 62, the rod 64 returns to its normal inward position to again move the fingers 68 into roller-obstructing position within the respective tubes, and the rod 65 moves outward to release the clamping engagement of its fingers 69 with the lowermost rollers in the respective columns and permits the columns to lower into contact with the fingers 68.

A stationary shaft 71 (Figs. 1, 4 and 16) rises from the bracket-plate 58 and has three sleeves, 72, 73 .and 74, mounted for relative rotary movements in loose superimposed order thereon. The top sleeve 74 has an arm 75 projecting transversely there from and in connection at its outer end with the rod 65, whereby a rocking of the..arm 75 will communicate a reciprocator g movement to said rod. The sleeve 74 also has an arm 76 projecting transversely therefrom and provided at its free end with a stop screw 77 for contact with a stop part 78, which is provided at the forward end portion of the slide 23 an fixed thereto for movements therewith. A coiled contractile spring 79 connects the arm7 5 to the standard 60 and normally urges the arm 75 to impart an inward movement to the rod and urges the screw 77 to bear against the part 78. It is thus evident that a forward movement of the slide 23 will rock the arm 75 outward against the tension of the spring 79, and that a rearward movement of said slide will permit the rod 65 to move inward to place the fingers 69 thereof into holding engagement with registering rollers a in the respective magazine tubes 61.

The sleeve 73 has an arm '80 projecting transversely therefrom and inconnection at its outer end with the rod 64. A coiled contractile spring 81 connects the arm 80 to the standard 60, whereby the rod 64 is normally urged to have inward movements with respect to said standard. An arm 82 also projects transversely from the sleeve 73 and is connected at its outer end by a rod 83 to one arm of a bell crank lever 84, which is fulcrumed on a stud 85 that rises from the plate 58 at the inner edge thereof, as shown in Figs. 3 and 4. One arm of the lever 84 the cam-plate 87 to the forward end portion of the bracket 89 and yieldingly retains the cam-plate in forward stop contact with a shoulder on the bracket. The cam-plate 87 is intended to engage the roller 86 and effect a rocking of the lever 84 during a rearward stroke of the slide 23, and upon a forward stroke of the slide cam-plate 87, upon moving into engagement with the roller 86, swings out of normal position to prevent a rocking of the lever 84 during such forward movementof the slide. The rocking of the lever 84, which is occasioned by' contact of the cam roller 86 with the cam-plate 87 during the rearward stroke of the slide 23, effects an outward movement of the rod 64 and a consequent movement of the fingers 68 to released position with respect to the rollers in the magazine, thereby permitting a downward feeding of the lowermost roller in each tube.

A bracket or frame part 91, Figs. 3, 4 and 14, is mounted on the rear edge of the bracket plate 58 and is disposed at an oblique angle to the longitudinal axis of the machine, as best shown in Fig. 4. The forward or angled end of the bracket 91 has an arm 92 projecting upward and forward therefrom and terminatin at its end in a vertical head or hearing s eeve 93 inwhich is journaled a stem or shaft 94. The stem 94 is provided at its upper end without the sleeve 93 with a collar and nut, as shown at p screws 97, or in any ot er suitable manner.-

The stem enlargement '96 has an arm 98 extending transversely therefrom (Fig. 4) and connected by a rod 99 to one arm of a bell-crank lever 100, which is mounted on a vertical stud 101 rising from he plate 58 adjacent to the edge of the slide 23. One arm of the lever 100 projects over the slide 23 and carries a roller 102, which, during a portion of the movement of the slide 23, coacts with the registering edge of a camplate 103 and imparts redetermined rockmg movements to the ever 100 and parts connected therewith. A standard 104 rises from the plate 58 in advance of the arm of the lever 100 to which the rod 99 connects, and is provided with a, stop screw 105, which engages the forward side of said lever arm and limits the forward rocking movements thereof. A coiled contractile spring 106 connects the lever 101 to the standard 104 and yieldingly retains the lever in stop contact with the screw 105, as shown in Fig. 4. The cam-plate 103 is mounted on the top of the bracket or frame part 89 and has the rear end of its roller coacting edge tapered to cause an outward swinging of the lever 100 when said plate moves into contact therewith upon a rearward stroke of the slide 23. The tapered edge of the cam-plate 103 is positioned to make contact with the roller 102 shortly after the slide 23 has begun its rearward stroke, and to eflect a turning of the receiver 62 to place the receiving passages or chamber 63 thereof into register with the outlet ends of the respective magazine tubes 61. The receiver is retained in this position during the remainder of the rearward stroke of the slide 23 and until the slide is returned to near-the limit of its forward stroke due to the prolon ation of the edge of the cam-plate 103 w1th which the lever roller 102 has contact, as is apparent by references to Fig. 4. When the slide 23 is at the limit of its forward stroke the nipples 40 of the roller holding arbors 32 are in longitudinal register with the respective passages 63 in the receiver 62, which receiver is then in its normal roller discharging position, as indicated in Figs. 4 and 14.

The spring fingers 63 project from the bracket 91 and bear inward at their outer ends against the outer side of the receiver (52 in positions to close the outer ends of the receiver passages 63 when in register with the magazine tubes 61. The fingers 63*prevent the rollers a from passing entirely through the passages 63 when discharged therein from the magazine.

Mounted in the bracket 91 for reciprocatory movements lengthwise thereof are a pair of roller introducing rams 107, one being provided for each roller holding arbor and adapted to have its forward end prd jected into the respective passage 63 of the receiver 62, when in normal position, and to eject a roller therefrom and into holding position in the mouth of the respective arbor nipple 40. Each ram 107 is provided with a collar 108 and mounted between this collar and the rear bearing through which the ram projects is a coiled compression spring 109, which imparts forward roller introducing movement tothe associated ram when released for such purpose. A ram retracting arm 110 (see 4) is mounted for horizontal swinging movements on a stud 111 rising from the forward edge of the plate 58 and has its free end projecting between the pair of rams 107 111 advance of the collars 108 thereon whereby a rearward swinging movement of the arm 110' will cause it to coact with said collars and impart a rearward retracting movement to the rams against the tension of the respective springs 109 and cause a withdrawal of the forward ends of the rams from within the receiver 62. When the rams 107 have been retracted a predetermined extent a trig er 112, which is pivoted, as at 113, to a s1de of the bracket 91 (Fig. 4) engages the collars 108 and retains'the rams in retracted position.

An arm 114 projects from the fulcrum end of the arm 110, cooperating therewith to form a bell-crank lever, and carries a roller 115 which, during the initial portion of a rearward stroke ofthe slide 23 coacts with a cam-plate 116 on the bracket or frame-part 89 and effects a rearward swinging or ram retracting movement to the arm 110. The plate 116, which is best shown in Fig. 5, is pivoted to said bracket at the forward end thereof, as at 117, below the planes of the cam-plates 87 and. 103 and is normally held in operative position by a coiled contractile spring 118. The plate 116-is adapted to swing rearward from its normal position so as to enable it to swing out of the path of movement of the roller 115 when the slide 23 is moved forward. It is evident by reference to Fig. 4 that as soon as the slide 23 begins to move rearward the cam plate 116 and roller 115 will coact to elfect a rearward swinging of the arm 110 and a consequent retracting of the rams 107 to retracted position. A coiled contractile spring 119 connects the arm 110 to a-post 120 rising from the plate 58 and normally retains said arm in contact with a stop 121 at the limit of its forward swinging movement, said stop 121 being carried by a standard 122' on the stationary plate 58*.

The trigger 112 has a rod 123 extending forward and rearward therefrom and connecting at its forward end to an arm 124 projecting from the sleeve 72 on the shaft 71.. The sleeve 72 also has an arm 125- projecting transversely therefrom (see Figs. 1, 4 and 16) and this-arm carries a stop screw 126 which coacts with the standard or frame part 78, which is carried by the bracket or frame part 89 at its forward end. (See Figs. 1 and 4.) A coiled contractile spring 127 connects the arm 124 to the post 120 and normally urges the screw 126 against the standard 78 so that the said screw follows the standard 78 in its rearward movements with the slide 23 until the arm 24 has moved into stop contact with the stop screw 128 carried by the standard 122. It is thus evident that when the slide 23 is near the limit of its forward movement, the standard 78 coacts with the screw 126 and communicates a ram releasing movement to the trigger 112-against the tension of the spring return to its normal collar engaging position during the initial portion of'each rearward stroke of said slide.

The grinding wheel 46 is mounted at the rear of the table 25 in a carriage 129, which is mounted on the frame for transverse hori zontal movements with respect thereto. The carriage 129 has a part 130 projecting downward from its bottom and in threaded engagement with an adjusting screw 131 (Fig. 3), which is journaled in the frame 1 transversely thereof and has its forward end projecting in advance of the frame and provided with a hand wheel 132. It is evident that a turning of the hand-wheel 132 will effect a forward or rearward adjustment of the grinding wheel 46. Mounted on the shaft with the grinding wheel 46 are a pair of stepped pulleys 133, in the present instance, which may be belted to any suitable source of power.

The means for automatically controlling the movements of the ejector rams 42 and the admission of a cleanin fluid under pressure to the interior of the nipples 40-of the roller carrying arbors at predetermined points in a swinging movement of said arbors, will now be described. Each ram 42 is provided at its outer end with a head 134 (Figs. 4, 6 and 10), which is provided on one side thereof with a rib or tongue 135 for traveling in a registering groove 136 in the respective side of the bearin part 38, said groove 136 being parallel with the lines of movement of the respective rams 42 and inclined with respect to the shaft 37' to conform to the inclination of the respective arbors 32. Projecting forward from the hearing part 48 at right angles to the shaft 37 is an arm 137, which has its outer end vertically broadened and bored to form a bearing for a vertical rock-shaft 138 that is mounted therein. This shaft is provided at each end of its bearing with a rocker-arm 139 the free end of which projects into a registering recess 140 provided in the adjacent side of the respective ram head 134, as best shown in Fig.10. The rocking movements of the arms 139 are intended to communicate reciprooatory movements to the respective rams 42, and inasmuch as the rams move in planes which are inclined with respect to the planes of rocking of the respective arms 139, said arms have transverse sliding connection with the heads 134, as shown. The shaft 138 has a finger 141 projecting radially from its lower end portion, the block forming said finger being secured in a transverse opening 1n the shaft by a stud 142 and havlng its tail end 143 projecting from the opposite side of the shaft in position to make contact with a stop screw 144 carried by a bracket 145 on the table 25 (Fig. 4); When the arbor carrying yoke 29, on a forward stroke of the slide 23, has been swung to a position in which the vertical plane of the arbors 32 stands approximately in register with the line m, a: in Fig. 4, the finger 141 will be in position to make contact with a registering trip finger 146 so that a continued forward swinging movement of the yoke 29 and parts carried thereby will cause the finger 141 to be quickly swung and to rock the shaft 37 in a direction to impart an inward roller ejecting movement to each ram 42. The ejecting movement which is thus imparted to each ram 42 is very sudden and rapid and effects a forceful ejection of the ground rollers from the arbor nipples when the arbors are approximately in the position at w, or midway between the grinding wheel 46 and receiver 62. The trip-finger 146 is mounted for horizontal rocking movements on a standard 147 that rises from the table 25. A spring 148 yieldingly holds the trip-finger in position to coact with the rocker-finger 141 and permits a movement of the tripfinger out of the path of movement of the finger 142 as said last finger moves into contact therewith during a rearward stroke of the slide 23. When the yoke 29 and parts carried thereby have returned to the posi tion shown in Fig. 4, the tail-piece 143 will have moved into contact with the screw 144 and effected a return of the shaft 138 and its arms 139 to normal position and a retraction of the ejector-rams 42. 149 designates an arm, which projects radially from the shaft 138 and is for the purpose of giving momentum to said shaft when swung by the coaction of the fingers 141 and 146.

The outer end of the arm 137 is provided with an extension 150 having a passage 151 lengthwise thcrethrough which is enlarged at its outer end, as at 152, to form a valve chamber with which a pipe or tube 153 leading from any suitable source of fluid under pressure has communication. A valve 154 normally closes the communication between the chamber 152 and passage 151, said valve being held seated by a spring 155 and having its stem 156 extended through the passage 151 and carrying a roller 157 at its inner end in contact with a registering portion of the shaft 138. The portion of the shaft 138 with which the roller 157 has contact is notched or incut, as at 158, Fig. 11, and the roller rests therein when the shaft is in normal position and the valve 154 is closed. When the shaft 138 is rocked from its normal position to impart an ejecting movement to the rams 42, the notch or incut 158 in the shaft turns out of register with the roller 157 and effects an outward movement of the stem 156 and valve 154 to ermit fluid pressure within the chamber 152 to enter the passage 151. The passage 151 has two flexible tubes 159 leading therefrom and connecting to the outer end portions of the respective rams 42 and having communication with the ram passages 44, as through a coupling member 16 provided on the outer end portion of each ram 42, as shown in Fig. 8. It is thus evident that when the rams have been moved inward, fluid pressure will be admitted to the interior of each ram and ejected therefrom through the transverse openings 45 and into the nipple bore 41, thus effecting a blowing out or cleaning of the nipple bore of any accumulated sand, emery or other matter sim ltaneously with theejection of the rollers a from the nipples.

The standard 26, which rises from the table 25, has an arm 161 (Figs. 4 and 12) projecting rearward therefrom and carrying a trimmer point 162 in position to have trimming contact with the periphery of the grinding-wheel 46 when the table '25 is moved backward and forward transversely of the wheel. The arm 161 is mounted for transverse sliding adjustment with respect to the standard 26 to facilitate a radial adjustment of the trimmer point with respect to the grinding wheel, and such adjustment is accomplished by a screw 163, which is threaded through a part of the standard 26 and has engagement with the inner portion of the arm 161.

of my invention is as follows: Presummg the parts of the machine to be in the position shown in thediiferent figures of the drawing and with particular reference to Fig. 4, it will be understood that the slide 23 moves rearward and the slide 21 forward at approximately the same time but .at difierent'speeds, due to the slide 23 having the greater length of stroke of the two. As the yoke 29' swings rearward or to the left, the outer convexed ends of the rollers a, which are carried by the arbor nipples 40, are swung forward or toward the peripheral portion of the grinding wheel 46 transversely thereof, and the swinging axes of the arbors are at thesame time.

moved forward transversely of the grindingwheel in a plane parallel with the grindingwheel axis, due to the shifting movement of the table 25, thus varying the position of the swinging axes of the grinding operation, as illustrated in, Fig. 19. This movement of the rollers causes them to coact with the entire working face of the grinding-wheel 1 and prevents the forming of furrows therein, as would be the case if the grinding took place on only a portion of the wheel periphery. ..When the yoke 29, on its forward or return stroke, is approximately in position for the arbors 32 to register with the line on, w the finger 141 coacts with the grip finger 146 and a continued forward swinging of the yoke causes a quick rocking of the shaft 138 and arms 139 and a consequent quick inward move ment of the ejector-rams 42. to effect an the rollers a during ejection of the ground rollers (L from the receiving ends of the respective arbors. At the same time fluid under pressure is admitted to the interiors of the nipples 40 from the inner ends thereof due to the opening of the valve 154 upon a turning of the shaft 138 from its normal position, thereby effecting a thorough cleaning of particles of sand, emery or other matter from the interior of the nipples. When the yoke 29 has been swung to near the limit of its forward swinging movement the tail-piece 143 strikes the stop-screw 144 and effects a return of the shaft 138, arms 139 and rams 42 to their normal inoperative positions, the valve 154 at the same time being permitted to close by reason of its control roller 153 dropping into the notch 158 in the shaft. During the initial portion of each rearward stroke of the slide 23 the magazine rod 65 is permitted to move inward to place the fingers 69 in holding engagement with the registering rollers a in the respective magazine tubes, such inward movement of said holding means being eifected'by the spring 7 9, as the part 78 against which the screw 7 7 bears moves rearward with the slide 23. As the slide 23 continues its rearward stroke the cam plate 103 next moves into camming contact with the roller 102 and effects a rocking of the bellcrank lever 100 against the tension ofv the spring 106, which movement of said lever is communicated through the rod 99 to the receiver 62, causing a turning of said receiver to place its roller receiving passages 63 into register with the discharge ends of the respective magazine tubes 61. The receiver 62 is then held in this position during the remainder of the rearward stroke and the greater portion of the forward stroke of the slide 23, due to the prolonged form of the cam plate 103. The next step in the operation occurs when the cam plate 87 moves into engagement with the roller 86 on the bell-crank lever 84 and rocks said leverto communicate an outward movement to the magazine rod 64 through the medium of the link .or rod 83 and connected arms 82 and 80, such movement being against the tension of the spring 81. The outward movement which is thus imparted to the rod 64 retracts the fingers 68 from within the respective magazine tubes 61 and permits a feeding of the lowermost roller a in each magazine tube to the respective passage 63 in the receiver 62, which passages, it will be understood, now stand in register with the magazine tubes. A pair of rollers having been fed in this manner to the receiver, the roller 86 passes from engagement with the cam plate 87 during the remainder of'the rearward stroke of the slide-23 and permits the rod 64 and stop fingers 68 carried thereby to return to their normal positions, as shown in Fig. 18. On the return or fortractthe rams 107 to ward stroke of the slide 23 the receiver 62 is turned from receiving to discharging position by the passing of the roller 102 from engagement with the cam plate 103', and when the slide is near the limit of its forward stroke the .part, 78 carried thereby moves into contact with the screw 126 on the rocker-arm 12:) and effects a rocking of the arm 124 against the tension of the spring 127 and a consequent withdrawing of the trigger 112 from stop engagement with the collars 108 on the rams 107. When the rams 107 are released by the trigger 112 the springs 109 drive the rams forward through the registering passages 63 in the receiver 62 and effect a forcing or driving of the rollers a, which were in the receiver passages, into the registering holding nipples 40 of the respective arbors 32, which at this stage in the operation stand in receiving position, as shown in Fig. 4. On the next rearward stroke of the slide 23, the trigger 112 is permitted to return to its normal position by reason of the part 78 moving from holding contact with the screw 126, and, at approximately the same time, the roller 115 passes over the cam plate 116 and causes a rearward movement of the arm 110 to retrigger engaging position. The part 78 in addition to acting on the trigger releasing mechanism when the slide 23 is at approximately the limit of its forward stroke also acts on the screw 77 to effect a withdrawal of the fingers 69 from holding engagement with the respective rollers a in the magazine tubes, thus permitting the column of rollers in each tube to lower into contact with the respective stop fingers 68, the fingers 68 and 69 then being in the position shown in Fig. 18. hen the roller 115 has passed over the cam plate 116 the arm 110 returns to its normal position and remains in such position until again moved, at the initial portion of the next rearward stroke of the slide 23, to effect a retraction of the rams 107 after forcing a pair of rollers a into the arbor nipples. It will be understood that on a forward stroke of the slide 23 the cam-plates 87 and 116 swing out of the path of travel of the rollers 86 and 115, respectively, so that no movement is imparted to the respective means to which said rollers are attached during a forward stroke of the slide.

It is evident from the foregoing description that a pair of rollers a are discharged from the receiver 62 into the respective receiving nipples of the arbor 32 when the slide 23 is approximately at the limit ,of its forward stroke; that during the next rearward stroke of the slide 23 the yoke 29 is swung rearward and the table 25 simultaneously moved forward to move the convexed ends of the rollers a, carried by the arbors, transversely periphery and at the centric to the axes of the roller ends; that during the rearward movement of the slide 23 the ram retracting arm 110 is first moved to retract the rams 107 to trigger engaging position by reason of the roller 115 riding over the cam-plate 116, after which the roller 102 engages the cam-plate 103 and effects a swinging of the receiver 62 into receiving relation to the magazine tubes 61; that the cam-plate 87 then engages the roller 86 and communicates an outward movement to the stop-fingers 68 in the magazine tubes to permit the lowermost rollers a in the magazine tubes to feed downward by gravity into the receiver 62, the outward move ment of said rollers through the receiver passages being prevented by the spring fingers 63, which project from the bracket 91 and close the outer ends of the passages 63 when the receiver is in receiving position. The'lowermg of the remaining rollers a in the'magazine tubes is prevented by reason of the fingers 69 being in holding engagement therewith at this stage in the operation. On the return or forward stroke of the slide 23, it will be understood that the yoke 29 is swung forward to its normal position simultaneously with a rearward movement of the table 25, and the ground rollers a are ejected from the arbors 32 when such arbors are approximately in the line it, a: in Fig. 4, due to the finger 141 making contact with thetrip finger 146 and imparting a quick inward throw to the ejecting rams 42, and at the same time opening the fluid pressure valve 154 and permitting air to rush into the arbor nipples for cleaning purposes; that when the slide 23 is near the end of its forward stroke,- the roller 102 passes from engagement with the'cam-plate 103 causing a return of thecreceiver 62 to discharging position, after which and when the slide 23 is at approximately the limit of its forward stroke the trigger 112 is tripped to release the rams 107 and permit them to shoot forward to discharge the rollers a of the grinding wheel from the receiver 62 and into the arbor nipplee1 40, which now stand in register therewit It is evident that my improved roller-end grinding machine, when working properly, requires no special attention of an attendant, except to see that sufficient rollers are maintained in the magazine tubes 61 tojpermit the regular feeding of rollers to the receiver 62, the successive feeding of rollers to the holding arbors, the moving of the arbors to and from grinding position and the discharging of the ground rollers therefrom taking place automatically and in proper sequential order during a running of the machine.

same time in arcs con-' not involve any departure claims, as obviously a great many changes in construction and design can be made without departing from the invention and without affecting the different sub-combinations thereof, and obviously also, various of the features described can be omitted, leaving the machine still operative to usefully do.certain of the work described, and such changes are contemplated by me and would from my invention.

Having thus I claim as new, ters Patent, is-

1. In .combination, a grinding member, rotatable work holding means mounted for swinging movements transverse to its axis of rotation, and mechanism operable to swing said men 18 with respect to said member and described my invention, what and'desire to secure by Le to simultaneously shift the swinging axis of said means in the same direction that the work holding end of said means is swung.

2. In combination, a grinding member, work holding means, and mechanism automatically operable to impart compound rocking and transverse reciprocatory movements to said means with respect to said member, the reciprocatory movements being parallel to the working face of said member.

3. In combination, a grinding member, a work holding arbor, and mechanism oper able to move said arbor to swing an en thereof transversely of said member and to simultaneously shi the swinging axis of said arbor with respect to said member in a plane parallel to the working face of said member.

4. In combination, a g inding member, a rotatable work holding arbor, means carrying said arbor for swinging movements an for reciprocatory movements transversely of said member and in a plane parallel to its working face, and mechanism operable to periodically impart predetermined swinging and reciprocatory movements to said means relative to said member.

5. In combination, a grinding member, rotatable, work holding means mounted for swinging movements transversely of its axis with its swinging axis disposed without its workholding end, mechanism said means with respect to operable to swing said member and to simultaneously shift the swinging axisof said means 1n the same direction that the work holding end of said means is swung, and means automatically work holding means motion that ments to said means with respect to said member,-the reciprocatory movements being parallel to the working axis of said member, and mechanism automatically operable at a predetermined point in a movement of said to eject a work piece therefrom.

7. In combination, a grinding member, rotatable work holding means mounted for swinging movements transverse to its axis of rotation, mechanism having two slides oper-' able to swing said means with respect to said member and to simultaneously shift the swinging axis of said means in the same dithe work holding end thereof is being sw g, and mechanism-automatically operable at a predetermined point in a movement of saidwork holding means to eject. a work piece therefrom.

8. In combination, a grinding member, a rotatable work holding means, mechanism automatically operable to impart difi'erent predetermined movements to said means with respect to said member with one movement parallel to the working face thereof, and means automatically operable at a predetermined point in a movement of said work holding means to eject a ground member therefrom and to discharge a cleaning fluid into said holding means.

9. In combination, a grinding member, a rotatable work holdingarbor, means carrying said arbor for swinging movements transversely of said member to move a work piece into and out of member engaging position, mechanism operable to periodically impart predetermined swinging movements to said means, and means automatically operable to eject a work piece from said arbor and to discharge a cleaning fluid into the arbor when the arbor is at a predetermined oint in its swinging movement.

10. In combination, a grinding member, a part mounted for swinging movements transversely of the periphery of said member, a plurality of work carried thereby and movable into and out of grinding relation to said member when the art is swung, and means for imparting predetermined compound movements to said part with respect to said member.

11. In combination, a grinding wheel, a yoke mounted for swinging movements with respect to said wheel, a plurality of work holding arbors rotatably carried by said yoke, means for rotating said arbors, and means for swinging said yoke with respect holding arbors rotatably arbor rotatably to said wheel to move the work carrying ends of the arbors into and out of grinding relation to said wheel and also operable to shift the swinging axis of said yoke transversely of the wheel periphery.

12. In combination, a grinding wheel, a table movable transversely of said Wheel periphery, a member carried by said-table for swinging movements relative thereto, a work holding arbor rotatably carried by said member, and means operable to impart different movements to said table and member to cause the work holding end of said arbor to have simultaneous swinging and linear movements in the same direction with respect to said wheel.

means automatically 14. In combination, a grinding Wheel, a partreciprocally movable transversely of a member carried for swinging movements by said part, a work holding same direction to said said member, respectively, with relation to said wheel, with the movements of the part parallel to the working face of the wheel. grinding wheel. a table reciprocally movable transversely said wheel, a member carried by said table for swlnging movements relative thereto. a work holding arbor rotatably carried by saidmember, means operable to impart pre determined reciprocatory and swinging movements to said table and member. respectively, relative to said wheel, and means operable to eject a ground work piece from said arbor when at a a movement thereof.

16. In a machine of the class described, a member mounted for swinging movements. a Work holding arbor rotatably carried by said member, determined swinging movements to said member, means bor, and mechanism automatically operable at a predetermined point in a movement of said member to eject a work piece from said arbor and to discharge a cleaning fluid t erem.

said ar-- the arbor.

18. In a machine of the class described, a member mounted for arbor, and impart predetermined swinging and linear reciprocatory movements to said member and mount, respectively.

19. In a machine wfof the class described,

her, a work holding arbor rotatably carried by said member, means for rotating said arbor, mechanism operable to impart automatic periodical I catory movements to said member and mount, respectively, and means operable to eject a work piece from said arbor when at a predetermined point in the thereof with said member.

20. In a machine of the class described, a reciprocally movable part, a member swin inqly carried b v said part, a work holding arbor carried by said member, means 0p.

erable to impart predetermined reciproca torv and swinging movements to and member, matically said part respectively, and means autooperable at a predeterminedpoint' 21. n a machine of the class described, a reciprocally movable part, a member swingingly carried by said part with its axis transverse to the plane of movement of the part. a work holding arbor carried by said member, an ejector ram reciprocally movable in said arbor and having a passage therethrough, and means automatically operable at a predetermined point in a move- 22. In a machine of the class described, a grinding whee, a member mounted Without one edge of said wheel for swinging movements transverse to the wheel eriphery, and a plurality of work holding arbors carried by said member and having their axes disposed grinding wheel axis.

23. In a machine of the class described, a 

